Respiratory mask



FIG. 1 is a front top right perspective view of a respiratory mask;

FIG. 2 is a front elevation view of the respiratory mask of FIG. 1 ;

FIG. 3 is a rear elevation view of the respiratory mask of FIG. 1 ;

FIG. 4 is a left elevation view of the respiratory mask of FIG. 1 ;

FIG. 5 is a right elevation view of the respiratory mask of FIG. 1 ;

FIG. 6 is a top plan view of the respiratory mask of FIG. 1 ; and,

FIG. 7 is a bottom plan view of the respiratory mask of FIG. 1 .

The material of a respiratory mask is one of synthetic resin, carbon/silicon material, fiber material and rubber material, or their combination. 

CLAIM The ornamental design for a respiratory mask, as shown and described. 